Pen



FIG. 1 is a front perspective view of an embodiment of the present invention;

FIG. 2 is a front elevation view of the embodiment of FIG. 1;

FIG. 3 is a rear elevation view of the embodiment of FIG. 1;

FIG. 4 is a top plan view of the embodiment of FIG. 1;

FIG. 5 is a side elevation view of the embodiment of FIG. 1;

FIG. 6 is a side elevation view of the embodiment of FIG. 1;

FIG. 7 is a front perspective view of the embodiment of FIG. 1, with the head bent forward; and,

FIG. 8 is a front perspective view of the embodiment of FIG. 1, with the head bent backward. 

An ornamental design for a pen, as shown and described. 